An advertising network claims that Mountain Lion powered more than 3 percent of all Macs within two days of the OS X update's release.
Yahoo said it has fixed the flaw that allowed hackers to steal more than 450,000 passwords from one of its many services.
Apple's Retina MacBook Pro is now shipping faster to online customers, according to the company's e-stores in several countries.
Google will pull the plug for Chrome running on OS X 10.5, aka Leopard, after it releases version 21, which is currently in beta and will reach the browser's stable channel next month.
Apple on Tuesday said the company will start selling the new iPad in China starting Friday, July 20.
Apple on Monday released a "golden master" of OS X Mountain Lion to developers, putting the impending operating system on track to reach customers this month. Apple said at June's WWDC that Lion would arrive in July.
Like 2009, this year is one of dueling operating system upgrades, when the two biggest desktop OS rivals face off with new editions.
Apple will boost the frequency of security updates in OS X Mountain Lion and automatically install required patches for users, steps that bring it into line with Microsoft's approach.
A 36-year-old Apple-1 personal computer -- one of just six thought to be in working condition -- sold for a record $374,500 at a New York auction Friday.
Apple's move to cut prices on three of its four MacBook Air models could prove challenging to computer makers looking to cash in on the thin-and-light category with Windows-powered ultrabooks.
In addition to patching seven critical vulnerabilities in Flash Player, Adobe also also released the "silent update" tool for OS X, and said it had prepped Flash for Mountain Lion by signing its code, a requirement if users are to install software downloaded from sources other than Apple's own Mac App Store.
Google says it will warn users of its Gmail online email services when it suspects they may be targets of "state-sponsored" attacks.
A near-record 81 percent of owners of Apple's newest iPad said that they were "very satisfied" with the tablet in a survey conducted by a market research firm last month.
Google's Chrome passed Mozilla's Firefox in May to become the world's second-most-popular browser.
Sotheby's will put some Apple history on the block next month, including one of only six working Apple-1 personal computers.